Bad luck 9800X3D overheating issue with 420mm AIO – reaches 90°C+
Bad luck 9800X3D overheating issue with 420mm AIO – reaches 90°C+
System notes indicate instability issues at high frequencies. Requires minimum 1.25V for stable operation. No record of the lowest voltage achieving full stability due to high power draw (~180W) and cooling limitations with a 420mm AIO. At 5200Mhz, it works at 1.2V but heats up to around 95°C. Performance appears worse at 1.25V compared to other 9800X3D models, with higher power consumption at that level. Reassessment suggests the GPU might struggle with overclocking despite not using Ryzen Master.
OCCT is the maximum temperature. Voltage above 1.25V causes issues even at 95°C. In games the temps are better, but I prefer keeping voltage under 1.25V to avoid overheating. Just aiming for a stable and well-cooled setup.
Well, these Ryzen 7000/9000 models typically reach 95°C during a full stress test, even with a 420mm AIO or a complete custom loop. The Ryzen 9000 X3D models are even more challenging to cool because of their stacked cache. They maintain a target temperature of 95°C and will keep boosting until power or clock limits are reached—they’re built to stay at that temperature indefinitely. It can feel warm and uncomfortable, but these CPUs operate quite differently from others on the market. Anything below 95°C is ideal, and they’re comfortable at 92°C as well. The CPU doesn’t mind whether it’s at 57°C or 92°C. Check out these videos for more details. The 9800X3D performs similarly to the 7950X in terms of temperature and performance. AM5 might look intense in the thumbnails, but don’t let that scare you.
It seems the system is overloading due to intensive Prime95 Small FFT calculations. Possible causes include high CPU usage, insufficient resources, or a malfunctioning processor under heavy load.
And I'm saying that I don't think Stresstest is really helpful. For example, my 9800X3D is overclocked to 5.4Ghz and it works fine during gaming, but it fails a real Prime95 stress test. Should I lower the speed back to 5.3Ghz just to pass that test? No, really. I'm not doing these tests on my own PCs for overclock stability—those are just for checking RAM stability. If something crashes during my own workloads, I'll tweak the settings or adjust voltage, not because a perfect stress test said so. Just wanted to make it clear.
My 7940HX consistently hits 99, though it's also overclocked by ASUS. hwinfo64 indicates no thermal throttling, which is good for a small APU. Running at 80+w is reasonable for a laptop, and even at 55w it still reached there. Basically, it seems normal—just double-check with hwinfo64 to ensure it isn't throttling.
These tests serve different purposes, like using prime95 and Superposition to check maximum system temperatures and power usage. However, for stability testing it's a very narrow approach—like when I used Corsair RAM, no benchmarks flagged issues but certain games still had glitches. Switching to Gskill RAM eliminated those problems and made the system run smoother. So tools like occt cinebench Aida mainly show no errors, which means they're more useful for quick checks rather than deep performance analysis.